As title says, whats the point behind rank 1? I placed an order right now.
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At rank 3 each subclass gets a quest for an exotic weapon, probably the easiest exotics you'll have to attain. Ace of Spades is pretty nice, Fabian Strategy needs some work and the Tlaloc is actually a really good scout rifle. Plus he drops decent weapons as you ranks up, I have gotten level 300 weapons from him.